| Id | Name | Systems | Actions |
|---|---|---|---|
| 3063 | Un Indien dans la ville | GB | Versions |
| 3563 | Uncharted 2: Among Thieves | Flash | Versions |
| 1303 | Undead Line | Genesis | Versions |
| 3327 | Undercover Cops | Arcade | Versions |
| 2994 | Underground Adventure | NES | Versions |
| 2169 | Undertale | Linux, Windows | Versions |
| 2984 | Unfabulous | GBA | Versions |
| 88 | Uninvited | NES | Versions |
| 1170 | Uniracers | SNES | Versions |
| 621 | Universal Soldier | Genesis | Versions |
| -1 | Unknown Game | NES | Versions |
| 4145 | Unlock Everything | Linux | Versions |
| 2520 | Uno | GBC | Versions |
| 3456 | Untitled Goose Game | Linux | Versions |
| 2363 | Unworthy | Windows | Versions |
| 3682 | Urachacha Mudaeri | Arcade | Versions |
| 577 | Urban Champion | NES | Versions |
| 3554 | Uridium | C64 | Versions |
| 2207 | Urusei Yatsura: Lum no Wedding Bell | NES | Versions |
| 2424 | USCF Chess | INTV | Versions |
| 4034 | Use Boxmen | Flash | Versions |
| 3736 | Utsurun Desu.: Kawauso Hawaii e Iku | NES | Versions |
| 2737 | VA-11 Hall-A: Cyberpunk Bartender Action | Linux | Versions |
| 1907 | Valis: The Fantasm Soldier | Genesis | Versions |
| 1714 | Valkyrie no Bouken: Toki no Kagi Densetsu | NES | Versions |